fix(store/valkey): Redis™ Sentinel doesn't require a password

Signed-off-by: Xe Iaso <me@xeiaso.net>

lib/store/valkey/factory.go

@@ -24,7 +24,6 @@ var (
 	// Sentinel validation errors
 	ErrSentinelMasterNameRequired = errors.New("valkey.Sentinel: masterName is required")
 	ErrSentinelAddrRequired       = errors.New("valkey.Sentinel: addr is required")
-	ErrSentinelPasswordRequired   = errors.New("valkey.Sentinel: password is required")
 	ErrSentinelAddrEmpty          = errors.New("valkey.Sentinel: addr cannot be empty")
 )
 
@@ -68,7 +67,7 @@ type Sentinel struct {
 	Addr       internal.ListOr[string] `json:"addr"`
 	ClientName string                  `json:"clientName,omitempty"`
 	Username   string                  `json:"username,omitempty"`
-	Password   string                  `json:"password"`
+	Password   string                  `json:"password,omitempty"`
 }
 
 func (s Sentinel) Valid() error {
@@ -94,10 +93,6 @@ func (s Sentinel) Valid() error {
 		}
 	}
 
-	if s.Password == "" {
-		errs = append(errs, ErrSentinelPasswordRequired)
-	}
-
 	if len(errs) > 0 {
 		return errors.Join(errs...)
 	}

lib/store/valkey/valkey_test.go

@@ -91,7 +91,7 @@ func TestFactoryValid(t *testing.T) {
 		{
 			name:        "sentinel missing password",
 			jsonData:    `{"sentinel": {"masterName": "mymaster", "addr": ["localhost:26379"]}}`,
-			expectError: ErrSentinelPasswordRequired,
+			expectError: nil,
 		},
 		{
 			name:        "sentinel with optional fields",